test_v2_cancel
test_v2_cancel(host_name, printer, "nosuchuser", last_id);
test_v2_cancel(host_name, printer, user_name, last_id);
test_v2_cancel(host_name, printer, user_name, "99999");
test_v2_cancel(host_name, "nosuchprinter", user_name, last_id);